Not all official art is key visuals - it's more that one is a subset of the other.

The latter is simply something that is released as promotional material to show how an anime will look like before it airs (such as character designs or a poster showing several characters at once), while the first could be anything from manga covers to clean art of mobage cards.

Not all official art is key visuals - it's more that one is a subset of the other.

The latter is simply something that is released as promotional material to show how an anime will look like before it airs (such as character designs or a poster showing several characters at once), while the first could be anything from manga covers to clean art of mobage cards.

Agreed. I started this tag because it was difficult to find key visuals otherwise with copyrights that have a lot of other kinds of official art.